This is different version of the original one, The Elemental Antedcedent... this may be better version since you have immunies, hard to beat especially since you have immunity to critical and sneak attacks. The original is crappy because of requirement to take Spellsword, instead of having that, I went ahead and did pure spellcasting class this time.

Name: The Elemental Antecedent
Race: Human
Alignment: True Neutral
Starting Class: Wizard

Feats to take:
Skill Focus(Spellcraft)
Spell Penetration

Abilities:

STR: 10
DEX: 10
CON: 14
INT: 18
WIS: 12
CHA: 8

Concentration +4
Lore +4
Spellcraft +4
Save 16 Points

==Bare Stats: Level 1==

AC: 10
HP: 6/6

Main Weapon: Unarmed
Attack Bonus: 0
Damage: 1-3(Critical: 20/x2)
Offhand Weapon: Not Applicable
Fortitude: 2
Reflex: 0
Will: 3
Base Attack: 0

Lvl. 2: Wizard

Concentration +1
Lore +1
Spellcraft +1
Save 20 Points

HP +6

Lvl. 3: Wizard
Craft Wondrous Item

Concentration +1
Lore +1
Spellcraft +1
Save 24 Points

HP +6

Lvl. 4: Wizard

Concentration +1
Lore +1
Spellcraft +1
Save 28 Points

HP +6

Lvl. 5: Wizard
Empower Spell

Concentration +1
Lore +1
Spellcraft +1
Save 32 Points

HP +6

Lvl. 6: Bonded Summoner(Earth)
Extend Spell

Concentration +1
Lore +1
Spellcraft +1
Save 36 Points

HP +6

Lvl. 7: Bonded Summoner

Concentration +1
Hide +5
Lore +1
Move Silently +5
Spellcraft +1
Tumble +5
Save 10 Points

Hp +6

Lvl. 8: Bonded Summoner

Concentration +1
Lore +1
Spellcraft +1
Save 15 Points

HP +6

Lvl. 9: Wizard
Combat Casting

Concentration +1
Hide +1
Lore +1
Move Silently +1
Spellcraft +1
Tumble +1
Save 14 Points

HP +6

Lvl. 10: Bonded Summoner

Concentration +1
Lore +1
Spellcraft +1
Save 19 Points

HP +6

Lvl. 11: Bonded Summoner

Concentration +1
Hide +1
Lore +1
Move Silently +1
Spellcraft +1
Tumble +1
Save 18 Points

HP +6

Lvl. 12: Wizard
Greater Spell Penetration

Concentration +1
Lore +1
Spellcraft +1
Save 23 Points

HP +6

Lvl. 13: Bonded Summoner

Concentration +1
Hide +1
Listen +5
Lore +1
Move Silently +1
Spellcraft +1
Spot +5
Tumble +1
Save 2 Points

HP +6

Lvl. 14: Bonded Summoner

Concentration +1
Lore +1
Spellcraft +1
Save 7 Points

HP +6

Lvl. 15: Wizard
Maximize Spell

Concentration +1
Hide +1
Listen +1
Lore +1
Move Silently +1
Spellcraft +1
Spot +1
Tumble +1
Save 2 Points

HP +6

Lvl. 16: Lich

Concentration +1
Lore +1
Spellcraft +1
Save 6 Points

HP +6

Lvl. 17: Lich

Concentration +1
Hide +1
Listen +1
Lore +1
Move Silently +1
Spellcraft +1
Spot +1
Tumble +1

HP +6

Lvl. 18: Lich
Spell Focus (Evocation)

Concentration +1
Listen +1
Lore +1
Spellcraft +1
Spot +1

HP +6

Lvl. 19: Lich

Concentration +1
Lore +1
Spellcraft +1
Save 4 Points

HP +6

Lvl. 20: Wizard

Concentration +1
Hide +1
Listen +1
Lore +1
Move Silently +1
Spellcraft +1
Spot +1
Tumble +1

HP +6

Lvl. 21: Wizard
Epic Skill Focus(Spellcraft)
Epic Spell Penetration

Concentration +1
Hide +1
Lore +1
Move Silently +1
Spellcraft +1
Tumble +1

HP +6

Lvl. 22: Bonded Summoner

Concentration +1
Listen +1
Lore +1
Spellcraft +1
Spot +1
Save 2 Points

HP +6

Lvl. 23: Bonded Summoner

Concentration +1
Hide +1
Lore +1
Move Silently +1
Spellcraft +1
Tumble +1
Save 2 Points

HP +6

Lvl. 24: Bonded Summoner
Greater Spell Focus(Evocation)

Concentration +1
Listen +2
Lore +1
Spellcraft +1
Spot +2

HP +6

Lvl. 25: Wizard

Concentration +1
Hide +1
Lore +1
Move Silently +1
Spellcraft +1
Tumble +1
Save 2 Points

HP +6

Lvl. 26: Wizard

Concentration +1
Listen +2
Lore +1
Spellcraft +1
Spot +2
Save 1 Point

HP +6

Lvl. 27: Wizard
Epic Spell Focus (Evocation)

Concentration +1
Hide +1
Listen +1
Lore +1
Move Silently +1
Spellcraft +1
Tumble +1

HP +6

Lvl. 28: Wizard

Concentration +1
Lore +1
Spellcraft +1
Spot +1
Save 5 Points

HP +6

Lvl. 29: Wizard
Focused Spell Penetration (Evocation)

Concentration +1
Hide +1
Listen +1
Lore +1
Move Silently +1
Spellcraft +1
Spot +1
Tumble +1
Save 2 Points

HP +6

Lvl. 30: Wizard
Practised Spellcaster (Wizard)

Concentration +1
Lore +1
Spellcraft +1
Save 9 Points

HP +6

Lvl. 31: Lich

Concentration +1
Hide +1
Listen +1
Lore +1
Move Silently +1
Spellcraft +1
Spot +1
Tumble +1
Save 4 Points

HP +6

Lvl. 32: Lich

Concentration +1
Lore +1
Spellcraft +1
Save 10 Points

HP +6

Lvl. 33: Wizard
Armor Skin

Concentration +1
Hide +1
Listen +1
Lore +1
Move Silently +1
Spellcraft +1
Spot +1
Tumble +1
Save 8 Points

HP +6

Lvl. 34: Lich

Concentration +1
Lore +1
Spellcraft +1
Save 14 Points

HP +9

Lvl. 35: Lich

Concentration +1
Hide +1
Listen +1
Lore +1
Move Silently +1
Spellcraft +1
Spot +1
Tumble +1
Save 10 Points

Lvl. 36: Wizard
Epic Toughness I

Concentration +1
Lore +1
Spellcraft +1
Save 16 Points

Lvl. 37: Lich

Concentration +1
Hide +1
Listen +1
Lore +1
Move Silently +1
Spellcraft +1
Spot +1
Tumble +1
Save 14 Points

HP +6

Lvl. 38: Lich

Concentration +1
Lore +1
Spellcraft +1
Save 20 Points

HP +6

Lvl. 39: Wizard
Epic Toughness II

Concentratio +1
Hide +1
Listen +1
Lore +1
Move Silently +1
Spellcraft +1
Spot +1
Tumble +1
Save 18 Points

HP +6

Lvl. 40: Wizard
Improved Combat Casting

Concentration +1
Lore +1
Search +13
Spellcraft +1

Put 1 point wherever you want.

HP +6

==Bare Stats: Level 40==
AC: 16
HP: 280/280 (Lich Bonuses: 520/520)

Main Weapon: Unarmed
Attack Bonus: +17/+12
Damage: 1-3 (Critical: 20/x2)
Offhand Weapon: Not Applicable
Fortitude: 23
Reflex: 25
Will: 37
Base Attack: 17

==Abilities Increments==
INT: 4, 8, 12, 16, 20, 24, 28, 32, 36, 40

==Final Skill Points==
Concentration 51
Hide 45
Listen 47
Lore 57
Move Silently 41
Search 47
Spellcraft 70
Spot 47
Tumble 21

Author's Notes:
Last few feats taken are just extras.... if anyone has suggestion for feats that are better than what I took, let me know.

Anuis
_________________
- Epic Character Builders Guild

- Life is but a dream...

- I know more than I am letting on...

-I think, Therefore I am. how can you get a lich?
_________________
sorry of my bad english, but i can't do anything cause i'm german To play a Lich you must download the PRC expansion. Its small and free. It comes with all sorts of neat stuff.

http://www.nwn-prc.com/